On 17 September 2010 00:38, Philip Herron <redbrain@xxxxxxxxxxx> wrote: > On 16 September 2010 19:14, <TorstenSteinert@xxxxxx> wrote: >> Hi folks, >> >> I have built the gcc version 4.5.1 on my MacBook Air running MacOS X Snow Leopard (to create a native gcc). >> >> I used the following configure options: ../gcc-4.5.1-src/configure --prefix=/usr --with-multilib=all --program-suffix=-4.5.1 >> Because of the parameter --with-multilib=all, I expected that the resulting gcc toolchain will allow me to make both 32 and 64 bit software. >> For that I also expected the standard libraries to be muli-format (mulitlib?). >> >> But libstdc++.6 is only in 64 bit format: >> bash-3.2$ file /usr/lib/libstdc++.6.dylib >> /usr/lib/libstdc++.6.dylib: Mach-O 64-bit dynamically linked shared library x86_64 >> >> There is another library, this one is multi-format. I don't know if this got created by compiling the gcc or if I had that one before builing gcc: >> bash-3.2$ file /usr/lib/libstdc++.6.0.9.dylib >> /usr/lib/libstdc++.6.0.9.dylib: Mach-O universal binary with 3 architectures >> /usr/lib/libstdc++.6.0.9.dylib (for architecture i386): Mach-O dynamically linked shared library i386 >> /usr/lib/libstdc++.6.0.9.dylib (for architecture ppc7400): Mach-O dynamically linked shared library ppc >> /usr/lib/libstdc++.6.0.9.dylib (for architecture x86_64): Mach-O 64-bit dynamically linked shared library x86_64 >> >> The problem is that when I start some programms, for example eclipse or firefox, it links to the libstdc++.6.dylib library but needs the 32-bit code. >> >> How can I tell the gcc to create the standard libraries with both i386 and x86_64 format (don't really need ppc)? >> > > Can you not compile and install twice with two different --prefix= > options so they are installed to two different locations? And is it > truly necessary to have compilers and libraries for both architectures > why not simply run whatever your cpu is? > > --Phil > Check out http://gcc.gnu.org/install/build.html, http://gcc.gnu.org/install/specific.html, http://wiki.osdev.org/GCC_Cross-Compiler, http://wiki.osdev.org/GCC_Cross-Compiler_for_x86_64 about cross compilation since in essence your really making 2 compilers targeted for 1 platform you host which both require different libraries for their target code to link of. --Phil
